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I was an undergraduate and a PhD student at York, then a temporary lecturer at Bristol and Manchester before holding a Royal Society European Research Fellowship at the Technische Hochschule, Darmstadt. I returned to York with an SERC (now EPSRC) Postdoctoral Fellowship, before taking up a lectureship here.
I have held a number of editorial positions. Currently I am on the Editorial Board of Semigroup Forum.
I am a member of the Ethics Committee of the European Mathematical Society.
I am an algebraist, interested in (among other things) structure theory for semigroups, endomorphism monoids of universal algebras, semigroups of quotients, S-acts over a monoid S and T-posets over an ordered monoid T. Several of these themes appear in my recent work, which has focused on free idempotent generated semigroups.
I work primarily in algebraic semigroup theory, focussing on a number of inter-related areas:
I have supervised to completion nine PhD students, eight of whom now hold academic positions, and a number of visiting research students, at both Masters and PhD level. Currently I am supervising four PhD students.
My PhD students have worked on topics fitting into one or more of the themes above. I am always pleased to learn new material, and am happy to consider potential students in any area of semigroup theory.